ISHS Acta Horticulturae 708: V International Strawberry Symposium
EFFECTS OF PLANT GROWTH REGULATORS ON OUT-OF-SEASON PRODUCTION OF STRAWBERRY |
| Authors: | M. Hamano, H. Yamazaki, S. Imada |
| Keywords: | Fragaria × ananassa, short-day June-bearing plant, over-wintered plant, flower induction, prohexadione calcium, gibberellin, cytokinin |
| Abstract:
For out-of-season strawberry production, plant growth regulators (PGRs) were used to promote flowering of short-day June-bearing cultivars. During the period of flower inhibition after chilling, application of a gibberellic acid (GA) biosynthesis in-hibitor, prohexadione calcium (PCa), reduced petiole length but did not enhance flower induction. Two-month-old runner plants in a flower inductive condition, treated with PCa, did not promote flower induction; benzyladenine delayed flowering and GA3 completely inhibited flowering. When GA1 was applied to shoot tips when plants were transferred from a flower inductive condition into a glasshouse in summer, flowering was inhibited. With sufficient duration of flower induction treatment, GA1 administered at any time did not promote flowering in this study. | |
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